Car-roof.



PATENTBD FEB. 26, 1907.

S. HERBERT.

GAR ROOF.

APPLICATION FILED MAY 14, 1906.

FIE.

FIETE.

INVE'HTOI? \FAMUEL HEHBEPT- UNITED sTATEs PATENT OFFICE.

SAMUEL HERBERT, OF DETROIT, MICHIGAN, ASSIGN OR TO HUTOHINS OAR ROOFINGCOMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

CAR-ROOF- Specification of Letters Patent.

Patented Feb. 26, 1907.

To all whom it may concern.-

Be it known that I, SAMUEL HERBERT, a citizen of the United States ofAmerica, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements in Car-Roofs, of which the following is a specification, reference being hadtherein to the accompanying drawings.

The invention relates to roofs for freightcars consisting primarily ofsuperimposedcourses of boards and an interposed waterproof fabric liningserving to prevent leakage through the board structure. In the formationof roofs of this character it is essential that the lining be not onlystrong and durable to withstand wear between the boards, butsufi'iciently pliable to yield to the strains imposed upon it occasionedby the twisting and rocking movements of the car. As these types of roofhave been previously construct ed the linings, usually coated orsaturated with a waterproofing compound, in a comparatively short periodof time dry out and, becoming hard and brittle, cracker break under theworking strains of the car.

The object of the present invention is to produce a freight-car roof inwhich the lining will retain its pliability for a maximum period oftime'greatly in excess of the life of the ordinary roof, so that underall ordinary conditions of usage it will remain unbroken and leakage beprevented.

A further ob'ect is to so form the lining that if cracked unusualstrains the openings or breaks willbe stopped or healed automaticallyand remain permanently closed.-

With these objects in view the invention consists in the novelconstruction of the carroof and in the peculiar arrangement andcombination of its parts, as will be more fully hereinafter set forth.

In the drawings, Figure 1 is a sectional perspective view, showing aportion of a carroof embodying my invention; and Fig. 2 is across-section through a portion of the lining, on enlarged scale.

The reference-letter A represents the usual roof-frame of any suitableconstruction, and upon the roof-frame is arranged the roof proper,consisting of two su erimposed courses of boards B B, preferab y matchedlumber, placed upon opposite sides of the ridge and nailed together andto the roofframe. Intermediate these courses is placed my improvedlining, which is clamped between the boards and serves to preventleakage through the board structure.

In construction the lining is composed of two external layers,preferably of wool felt J and K, either or both of which may be composedof sin le or multi-ply felt, as may be desired, the atter being used,preferably, to produce a more durable structure. Between these layers isarranged a central layer L, of coarsely woven or open-mesh fabric,preferably burla These several layers are saturated, pre erably, with awaterproofing compound, as asphaltum, the central layer beingsupersaturated with this compdsition, and between the latter layer andeach of the two external layers is placed a layer of the as phaltumcompoun indicated by the reference, letters Maud O. As thus constructedthe lining is provided with an excess amount of the roofing compound,which isalways in a viscous or glutinous state, serving to keep theexternal layers in the pliable condition desired, and at the same timeis enabled to enter and fill any cracks or breaks that may occur in theexternal layers owing to exceptional strains imposed by the car, thushealing or closing the openings and sealing the lining permanentlyagainst leakage. The interposed fabric of the lining, by reason of itscoarse mesh, permits the asphaltuni or any cementitious roofing compoundthat may be used to pass readily theret-hrough, so that the entirefabric is saturated. In this condition it acts as a retainer, holdingthe glutinous compound from leakage through the external layer. whilethe latter serves to keep the interior of the lining airtight. In thismanner a lining is produced which, as previously stated, is always in apliable or yielding condition, giving the results described. It is alsoto be noticed that the ing longitudinally of the roof and the sheetsoverlapping at the ridge in the ordinary manner and being of suflieientwidth to extend downwardly, as indicated, to overlap the interiorcornices. The upper course of boards rests directly upon the lining inthe usual manner and is nailed to the lower course.

What I claim is 1. In a car-roof, the combination with the roof-frame,of superimposed courses of boards thereon, and a compound pliablewaterproof lining intermediate the courses consisting of exterior layersof roofing material saturated with a waterproof compound, a centrallayer of coarse open-mesh fabric supersaturated with a waterproofingcomposition, and a layer of cementitious waterproofing compound in aglutinous state interposed between each external layer and the centrallayer.

'2. In a car-roof, the combination Witha suitable roof-frame, of twosuperimposed courses of boards thereon, and a compound liable liningintermediate of and clamped between said courses, consisting of exteriorlayers of wool felt saturated Wit-h asphaltum, a central layer of burlapsupersaturatedwith asphaltum, and layers of asphaltum in a glutinousstate arranged between the exterior layers and the saturated burlap.

In testimony whereof I aflix my signature in presence of two witnesses.

SAMUEL HERBERT.

